NF EN 28996

La présente norme expérimentale fait partie d'un ensemble de normes spécifiant des méthodes de mesure et d'évaluation des ambiances thermiques modérées et extrêmes auxquelles l'homme est exposé. L'un des paramètres de la contrainte thermique étant le métabolisme énergétique, la présente norme permet de le déterminer.

The metabolic rate, as a conversion of chemical into mechanical and thermal energy, measures the energetic cost of muscular load and gives a numerical index of activity. Metabolic rate is an important determinant of the comfort or the strain resulting from exposure to a thermal environment. In particular, in hot climates, the high levels of metabolic heat production associated with muscular work aggravate heat stress, as large amounts of heat need to be dissipated, mostly by sweat evaporation. ISO 8996:2004 specifies different methods for the determination of metabolic rate in the context of ergonomics of the climatic working environment. It can also be used for other applications -- for example, the assessment of working practices, the energetic cost of specific jobs or sport activities, the total cost of an activity, etc.